US3680476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously operating press
Assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
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Filing: 1970-08-04
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Granted: 1972-08-01
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Expires: 1990-08-04
Abstract
Abstract A first plurality of endless steel belts is interposed between a plunger and a table and abuts against the plunger. A second plurality of endless steel belts is interposed between the plunger and the table and abuts against the table. Different combinations of drive rollers and deflection rollers are utilized to move the steel belts around the plunger and around the table.
Inventors
- 👤 Heinrich Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:55
CPC Classifications
B; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B27; B27D; B27D3/00; B27D3/04; B27N; B27N3/00; B27N3/08; B27N3/24
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
In a continuously operating press for producing wood composition boards, fiber panels, plywood, and the like, including a table, a plunger and pressure means for applying pressure to the plunger to compress material between said plunger and said table, said plunger and said table having a variable pressure gap between them, moving means for moving the material between said plunger and said table during the application of pressure thereto, said moving means comprising endless steel belt means interposed between and abutting against said plunger and said table, and roller means for moving the steel belt means around said plunger and around said table, said endless steel belt means comprising a first plurality of endless steel belts for the plunger and a second plurality of endless steel belts for the table.
Claim 2
Dependent Claim
130 words
In a continuously operating press for producing wood composition boards, fiber panels, plywood, and the like, including a table, a plunger and pressure means for applying pressure to the plunger to compress material between said plunger and said table, said plunger and said table having a variable pressure gap between them, moving means for moving the material between said plunger and said table during the application of pressure thereto, said moving means comprising endless steel belt means interposed between and abutting against said plunger and said table, and roller means for moving the steel belt means around said plunger and around said table, said endless steel belt means comprising a first plurality of endless steel belts for the plunger and a second plurality of endless steel belts for the table.
Claim 3
Dependent Claim
55 words
A continuously operating press as claimed in claim 1, wherein said roller means comprises a plurality of drive rollers each driving a corresponding one of said first and second pluralities of endless steel belts and a plurality of deflection rollers each guiding a corresponding one of said first and second pluralities of endless steel belts.
Claim 4
Dependent Claim
67 words
A continuously operating press as claimed in claim 1, wherein said roller means comprises a first drive roller for driving said first plurality of endless steel belts, a first deflection roller for guiding said first plurality of endless steel belts, a second drive roller for driving said second plurality of endless steel belts and a second deflection roller for guiding said second plurality of endless steel belts.
Claim 5
Dependent Claim
79 words
A continuously operating press as claimed in claim 3, wherein said roller means comprises a first drive roller for driving said first plurality of endless steel belts, a first plurality of deflection rollers each guiding a corresponding one of said first plurality of endless steel belts, a second drive roller for driving said second plurality of endless steel belts and a second plurality of deflection rollers each guiding a corresponding one of said second plurality of endless steel belts.
Claim 6
Dependent Claim
79 words
A continuously operating press as claimed in claim 1, wherein said roller means comprises a first plurality of drive rollers each driving a corresponding one of said first plurality of endless steel belts, a first deflection roller for guiding said first plurality of endless steel belts, a second plurality of drive rollers each driving a corresponding one of said second plurality of endless steel belts and a second deflection roller for guiding said second plurality of endless steel belts.
Claim 7
Dependent Claim
23 words
A continuously operating press as claimed in claim 1, whErein said moving means further comprises a single driving means driving said roller means.
Claim 8
Dependent Claim
54 words
A continuously operating press as claimed in claim 1, further comprising a first web of synthetic material on said plunger interposed between said plunger and said first plurality of endless steel belts and a second web of synthetic material on said table interposed between said table and said second plurality of endless steel belts.
Claim 9
Dependent Claim
21 words
A continuously operating press as claimed in claim 7, wherein the synthetic material of said first and second webs is polytetrafluorethylene.
Claim 10
Dependent Claim
40 words
A continuously operating press as claimed in claim 7, further comprising alarm means electrically connected to said first and second webs in a manner whereby said alarm means is actuated when either of said first and second webs is damaged.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |